// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_IA32_FRAME_CONSTANTS_IA32_H_
#define V8_IA32_FRAME_CONSTANTS_IA32_H_

#include "src/base/macros.h"
#include "src/frame-constants.h"

namespace v8 {
namespace internal {

    class EntryFrameConstants : public AllStatic {
    public:
        // This is the offset to where JSEntry pushes the current value of
        // Isolate::c_entry_fp onto the stack.
        static constexpr int kCallerFPOffset = -6 * kSystemPointerSize;

        // EntryFrame is used by JSEntry, JSConstructEntry and JSRunMicrotasksEntry.
        // All of them take |root_register_value| as the first parameter.
        static constexpr int kRootRegisterValueOffset = +2 * kSystemPointerSize;

        // Rest of parameters passed to JSEntry and JSConstructEntry.
        static constexpr int kNewTargetArgOffset = +3 * kSystemPointerSize;
        static constexpr int kFunctionArgOffset = +4 * kSystemPointerSize;
        static constexpr int kReceiverArgOffset = +5 * kSystemPointerSize;
        static constexpr int kArgcOffset = +6 * kSystemPointerSize;
        static constexpr int kArgvOffset = +7 * kSystemPointerSize;

        // Rest of parameters passed to JSRunMicrotasksEntry.
        static constexpr int kMicrotaskQueueArgOffset = +3 * kSystemPointerSize;
    };

    class ExitFrameConstants : public TypedFrameConstants {
    public:
        static constexpr int kSPOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
        DEFINE_TYPED_FRAME_SIZES(1);

        static constexpr int kCallerFPOffset = 0 * kSystemPointerSize;
        static constexpr int kCallerPCOffset = +1 * kSystemPointerSize;

        // FP-relative displacement of the caller's SP.  It points just
        // below the saved PC.
        static constexpr int kCallerSPDisplacement = +2 * kSystemPointerSize;

        static constexpr int kConstantPoolOffset = 0; // Not used
    };

    class WasmCompileLazyFrameConstants : public TypedFrameConstants {
    public:
        static constexpr int kNumberOfSavedGpParamRegs = 4;
        static constexpr int kNumberOfSavedFpParamRegs = 6;

        // FP-relative.
        static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
        static constexpr int kFixedFrameSizeFromFp = TypedFrameConstants::kFixedFrameSizeFromFp + kNumberOfSavedGpParamRegs * kSystemPointerSize + kNumberOfSavedFpParamRegs * kSimd128Size;
    };

    class JavaScriptFrameConstants : public AllStatic {
    public:
        // FP-relative.
        static constexpr int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
        static constexpr int kLastParameterOffset = +2 * kSystemPointerSize;
        static constexpr int kFunctionOffset = StandardFrameConstants::kFunctionOffset;

        // Caller SP-relative.
        static constexpr int kParam0Offset = -2 * kSystemPointerSize;
        static constexpr int kReceiverOffset = -1 * kSystemPointerSize;
    };

} // namespace internal
} // namespace v8

#endif // V8_IA32_FRAME_CONSTANTS_IA32_H_
